Safety device for elevators



Dec. 29, 1931. A. T. BROWN 1,833,524

SAFETY DEVICE FOR ELEVATORS Filed Sept. 26, 1930 2 Sheets-Sheet l 1931- A. T. BROWN 1,838,524 I SAFETY DEVICE FOR ELEVATORS Filed Sept. 26, 1930 2 Sheets-Sheet 2 V Patented Dec. 29, 1931 res Mam-mew- N T DSTA PATENT orrlca ALFRED '1'. BROWN, or GINCINNATLf OHIO, ASSIGNOR TO THE WAR ER ELEVATO MANUFACTURING COMPANY, or CINCINNATI, OHIO, A CORPORATION or OHIO SAFETY DEVICE FOR ELEVATORS Application filed September 26, 1930. Serial- Noi 484,515.

My invention relates to a safety device for an elevator system-having for its object the provision of means controlled by the car travel for automatically rendering the car door inoperative intermediate floors and automatically rendering it manually and unitarily operative with the hatchway floor door when the car and building floors are in alignment.

Whilst the invention has safety utility in any elevator system employing horizontally sliding car doors which may or may not be used with sliding doors, its field of particular utility as regards modern elevator practice, comprises the application of the concept herein disclosed to an elevator system which employs the unit motor mechanism door control in the car, or shaftway, wherein the safety devices are in the nature of automatisms not within the control of the operator, that is to say, no malfunction is possible.

The features of my invention are more fully set forth in a description of the accompanying drawings forming a part of this specification, in which Figure 1 is a central vertical section of an elevator shaft and hatchway.

Figure 2 is an enlarged view of the lower sections. v

Figure 3 is a section on line 3-3 of Fig. 2. Figure 4 is a view taken the same as Fig. l, but showing modifications. j

Figure 5 is a view taken the same as Fig. 2, but showing modifications. V

Figure 6 is a section on l'ne 6-6, of Fig. 5. A section of the elevator shaft showing the floors and hatchway is illustrated, wherein 1 indicates the wall of the elevator shaft, 2 the building floor, 3 the elevator car flor,4 the hatchway floor door, the car, and 6 the car door. I r

The safety mechanisms comprise interlock instrumentalities in the nature of mating male and female members, one set of said I members, say the male components, being serially disposed in precise vertical alignment with one another, attached on the one wall of the shaft, one between each floor, and on the shaft face of the hatchway floor door. I The coacting member, say the female comtaken at one secured to the outer face of the car door.

ponent, is secured to the outer face of the car door for telescopic engagement with the male members during the elevator travel and when the car door is closed. r

lVhilst I have shown vfor simplicty, inter.-

locking members of the species comprising a 7 channel member and series of channel riding members, ralls or rollers, formlng an accurate guide for the moving and statlonary interlocking devices, it is observablethat the relative position of the male and female members can be transposed, and also, 'thatthe exact structure of the interlocking devices is not necessarily of limiting import.

In the form shown by way of example, the female member comprises a channel iron 7 A series of male members shown as rail sections 8, Figure 2, or alternately as roller posts 9,

Figure 4, are secured respectively to the inner or shaft face of the hatchwav floor doors and to the shaft walls' intermediate the several floors. These stationary members of the safety interlock are in precise vertical alignment with oneanother and with the channel strip 7 of'the car door when closed, thus'providing the telescopic action wherein the car member successively" engages respectively the hatchway floor door and the shaft mating members in the interlock; a

When the car. floor and the building floor are in substantial alignment, the car and hatchway floor doors are operatively interlocked for unitary action under the control of the operator. '"When the: members engage intermediate the 'floors,the.car door is interlockedin relation to the wall of the elevator shaft, i. c. it is rendered inoperative.

"Inasmuch as the car door cannot be hori zontally shifted between floors, the car door matingv member is accurately and rigidly held in correct positionfor invariable engage wall ment and coaction with the mating members ersing between the floors, is not" only a safety" measure of great value but, as disclosedfthe same instrumentality becomes a double door actuating device when, and only when thecar floor is in proper registry with the building floor. In addition to the safety feature, this invention provides a saving of time and effort and an invariability of result. From the structural viewpoint there is also the resulting economy in initial cost of, equipment as well as in maintenance of the elevator service.

Having described my invention, I claim:

1. In combination with an elevator system employing horizontally sliding car and hatchway floor doors, a safety device com prising interlock instrumentalities on the opposing faces of the car and hatchway floor doors, and the shaft wall intermediate floors successively engaging during car travel, said instrumentalities functioning between floors to interlock the car door in relation tothe shaft wall and to interlock the car and hat-chway floor doors for unitary movement when the car and building floors are in alignment.

2. In combination with an elevator system employing horizontally sliding car and hatchway floor doors, a safety device comprising aligned interlock instrumentalities on the opposing faces of the car and hatchway floor doors, and shaft wall intermediate floors, successively engaging telescopically during car travel, said instrumentalities functioning between floors to interlock the car door in relation to the shaft wall and to interlock the car door and hatchway floor door for unitary movement when the car and building floors are in alignment.

3. In combination with an elevator system employing horizontally sliding car and hatchway floor doors, interlock instrumentalities constituting a safety device, said instrumentalities comprising aligned channel and channel riding members arranged for relative and successive telescopic engagement during car travel, the said members being respectively disposed on the opposing faces of the car and hatchway doors and of the shaft wall intermediate floors, enabling the hatchway floor door to be opened and closed by manipulation of the car door when the car and building floors are in alignment but rendering the car doorinoperative intermediate floors.

4.. In combination withian elevator system employing horizontally sliding car and hatchway floor doors, means controlled by the car travel, rendering the car door inoperative intermediate floors, and devices controlled by the car travel operatively connecting the ear and hatchway floor doors when the car and building floors are respectively in alignment.

5. In combination with an elevator system employing horizontally sliding car and hatch-- way floor doors, a safety device comprising aligned interlock instrumentalities on the car door and shaft wall intermediate floors, rendering the car door inoperative intermediate floors, and means governed by the car travel operatively connecting the car and hatchway doors when the car and building floors are in alignment.

6. In combination with an elevator system employing horizontally sliding car and hatchway floor doors, coincidentally aligned interlock members on the inner faces of the hatchway doors and the shaft wall intermedi ate floors, and a mating interlock member on the car door arranged for successive telescopic engagement with said first named members, holding the car door inoperative intermediate floors and rendering the hatchway floor door unitarily operative with the car door when the car and building floors are aligned.

7. In combination with an elevator system employing a horizontally sliding car door, devices disposed in the hatchway and 011 the door of the car, said devices interlocking intermediate the floors for preventing opening of the car door when the carvis not in substantial registry with the floors.

In witness whereof, I hereunto subscribe my name.

ALFRED T. BROWN. 

